Isothermal vapor−liquid equilibrium (VLE) data at 333.15 K are reported for the binary systems of di-n-butyl
ether (DBE) + ethanol, ethanol + benzene, DBE + benzene, and the ternary system of DBE + ethanol + benzene
by using headspace gas chromatography. The experimental binary VLE data were correlated with common G
E
model equations. The ternary VLE data were correlated also with Wilson, NRTL, and UNIQUAC models.
Additionally the excess molar volumes (V
E) and deviations in molar refractivity (ΔR) at 298.15 K for the constituent
binary and ternary systems of DBE + ethanol + benzene were determined from measured densities and refractive
indices. The experimental V
E and ΔR were correlated with Redlich−Kister or Cibulka equation for the binary
and ternary systems, respectively. The ternary V
E and ΔR were also compared with the estimated values from
the binary contribution models of of Tsao−Smith, Kohler, Rastogi, and Radojkovič.
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